Code No: R05220301
R05
Set No. 2
in
II B.Tech II Semester Examinations,December 2010 BASIC ELECTRONICS Common to Mechanical Engineering, Production Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. (a) List different methods of turning-on of SCR and explain one of the methods.
[10+6]
ld .
(b) Discuss important features of TRIAC.
2. (a) Draw the circuit of Hartley oscillator employing transistor and explain the working of it. Derive the expression for frequency of oscillation fo .
or
(b) Calculate the frequency of oscillation of a transistor Hartley oscillator having L1 = 25 µH, L2 = 100 µ H, Mutual Inductance M = 20 µH. and C =100 p f. [10+6] 3. (a) Describe the features of 8085 CPU?
(b) Explain various functions of control unit.
[8+8]
uW
4. (a) Discuss with mathematical expressions, how the negative feedback in amplifiers reduces the distortion and increases the band width of the amplifier. (b) Calculate
i. voltage gain ii. output impedance. iii. Band width of a feedback amplifier with parameters of the internal amplifier as A=250, Z0 =30 k Ω, Bandwidth = 50 kHz and having feedback factor β =0.02. [8+8]
nt
5. (a) Explain the concept of “ hole” in a semi conductor. (b) Explain the difference between Ideal Diode and commercial diode with the help of V-I Characteristics .
Aj
(c) Draw the circuit of Half wave rectifier with L- section filter and explain the working of it. [4+4+8]
6. (a) Explain why the transistors are current sensitive. (b) Draw the circuit diagram of CB amplifier with an NPN transistor and explain the working of it. (c) A transistor has α = 0.98. The transistor is connected with its emitter grounded. If the base current is changed by 0.2 mA, calculate the change in collector current. [3+8+5]
7. (a) Classify timers according to the function and the techniques used.
1
Code No: R05220301
R05
Set No. 2
(b) Draw the circuit and explain the working of “Magnetic Energy Storage Welder”. [8+8] 8. (a) Explain the application of Dielectric heating for i. wood gluing and ii. pre heating of Plastic Preforms.
in
(b) Give the necessary block diagram and explain the working of Pulse echo ultrasonic flaw detector. [8+8]
Aj
nt
uW
or
ld .
?????
2
Code No: R05220301
R05
Set No. 4
in
II B.Tech II Semester Examinations,December 2010 BASIC ELECTRONICS Common to Mechanical Engineering, Production Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. (a) Discuss with mathematical expressions, how the negative feedback in amplifiers reduces the distortion and increases the band width of the amplifier.
ld .
(b) Calculate
or
i. voltage gain ii. output impedance. iii. Band width of a feedback amplifier with parameters of the internal amplifier as A=250, Z0 =30 k Ω, Bandwidth = 50 kHz and having feedback factor β =0.02. [8+8] 2. (a) Explain the concept of “ hole” in a semi conductor.
(b) Explain the difference between Ideal Diode and commercial diode with the help of V-I Characteristics .
uW
(c) Draw the circuit of Half wave rectifier with L- section filter and explain the working of it. [4+4+8] 3. (a) Describe the features of 8085 CPU?
(b) Explain various functions of control unit.
[8+8]
4. (a) Draw the circuit of Hartley oscillator employing transistor and explain the working of it. Derive the expression for frequency of oscillation fo .
nt
(b) Calculate the frequency of oscillation of a transistor Hartley oscillator having L1 = 25 µH, L2 = 100 µ H, Mutual Inductance M = 20 µH. and C =100 p f. [10+6]
5. (a) Explain why the transistors are current sensitive.
Aj
(b) Draw the circuit diagram of CB amplifier with an NPN transistor and explain the working of it. (c) A transistor has α = 0.98. The transistor is connected with its emitter grounded. If the base current is changed by 0.2 mA, calculate the change in collector current. [3+8+5]
6. (a) Explain the application of Dielectric heating for i. wood gluing and ii. pre heating of Plastic Preforms.
(b) Give the necessary block diagram and explain the working of Pulse echo ultrasonic flaw detector. [8+8] 3
Code No: R05220301
R05
Set No. 4
7. (a) Classify timers according to the function and the techniques used. (b) Draw the circuit and explain the working of “Magnetic Energy Storage Welder”. [8+8] 8. (a) List different methods of turning-on of SCR and explain one of the methods. [10+6]
in
(b) Discuss important features of TRIAC.
Aj
nt
uW
or
ld .
?????
4
Code No: R05220301
R05
Set No. 1
1. (a) Explain why the transistors are current sensitive.
in
II B.Tech II Semester Examinations,December 2010 BASIC ELECTRONICS Common to Mechanical Engineering, Production Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ?????
ld .
(b) Draw the circuit diagram of CB amplifier with an NPN transistor and explain the working of it.
(c) A transistor has α = 0.98. The transistor is connected with its emitter grounded. If the base current is changed by 0.2 mA, calculate the change in collector current. [3+8+5]
(b) Calculate
or
2. (a) Discuss with mathematical expressions, how the negative feedback in amplifiers reduces the distortion and increases the band width of the amplifier.
uW
i. voltage gain ii. output impedance. iii. Band width of a feedback amplifier with parameters of the internal amplifier as A=250, Z0 =30 k Ω, Bandwidth = 50 kHz and having feedback factor β =0.02. [8+8] 3. (a) Explain the application of Dielectric heating for i. wood gluing and ii. pre heating of Plastic Preforms.
nt
(b) Give the necessary block diagram and explain the working of Pulse echo ultrasonic flaw detector. [8+8]
4. (a) Explain the concept of “ hole” in a semi conductor. (b) Explain the difference between Ideal Diode and commercial diode with the help of V-I Characteristics .
Aj
(c) Draw the circuit of Half wave rectifier with L- section filter and explain the working of it. [4+4+8]
5. (a) Classify timers according to the function and the techniques used. (b) Draw the circuit and explain the working of “Magnetic Energy Storage Welder”. [8+8]
6. (a) Describe the features of 8085 CPU? (b) Explain various functions of control unit.
5
[8+8]
Code No: R05220301
R05
Set No. 1
7. (a) Draw the circuit of Hartley oscillator employing transistor and explain the working of it. Derive the expression for frequency of oscillation fo . (b) Calculate the frequency of oscillation of a transistor Hartley oscillator having L1 = 25 µH, L2 = 100 µ H, Mutual Inductance M = 20 µH. and C =100 p f. [10+6]
in
8. (a) List different methods of turning-on of SCR and explain one of the methods. (b) Discuss important features of TRIAC.
[10+6]
Aj
nt
uW
or
ld .
?????
6
Code No: R05220301
R05
Set No. 3
i. wood gluing and ii. pre heating of Plastic Preforms.
ld .
1. (a) Explain the application of Dielectric heating for
in
II B.Tech II Semester Examinations,December 2010 BASIC ELECTRONICS Common to Mechanical Engineering, Production Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ?????
(b) Give the necessary block diagram and explain the working of Pulse echo ultrasonic flaw detector. [8+8]
(b) Calculate
or
2. (a) Discuss with mathematical expressions, how the negative feedback in amplifiers reduces the distortion and increases the band width of the amplifier.
uW
i. voltage gain ii. output impedance. iii. Band width of a feedback amplifier with parameters of the internal amplifier as A=250, Z0 =30 k Ω, Bandwidth = 50 kHz and having feedback factor β =0.02. [8+8] 3. (a) Describe the features of 8085 CPU?
(b) Explain various functions of control unit.
[8+8]
4. (a) Classify timers according to the function and the techniques used.
nt
(b) Draw the circuit and explain the working of “Magnetic Energy Storage Welder”. [8+8] 5. (a) Draw the circuit of Hartley oscillator employing transistor and explain the working of it. Derive the expression for frequency of oscillation fo .
Aj
(b) Calculate the frequency of oscillation of a transistor Hartley oscillator having L1 = 25 µH, L2 = 100 µ H, Mutual Inductance M = 20 µH. and C =100 p f. [10+6]
6. (a) List different methods of turning-on of SCR and explain one of the methods. (b) Discuss important features of TRIAC.
[10+6]
7. (a) Explain the concept of “ hole” in a semi conductor. (b) Explain the difference between Ideal Diode and commercial diode with the help of V-I Characteristics . (c) Draw the circuit of Half wave rectifier with L- section filter and explain the working of it. [4+4+8] 7
Code No: R05220301
R05
Set No. 3
8. (a) Explain why the transistors are current sensitive. (b) Draw the circuit diagram of CB amplifier with an NPN transistor and explain the working of it.
in
(c) A transistor has α = 0.98. The transistor is connected with its emitter grounded. If the base current is changed by 0.2 mA, calculate the change in collector current. [3+8+5]
Aj
nt
uW
or
ld .
?????
8